A food product McDonald's tries to pass off as "100% White Chicken Meat", but in fact should be thought of as "100% Chicken" This is because the process of making a McNugget is as follows:
McDonald's first finds themselves a live chicken.
They then crush said chicken until all of the parts of the chicken mix completely to form one consistent substance closely resembling rubber.
After this is done, McDonald's forms this substance into a nugget shape and deep fries it; thus giving the world Chicken McNuggets.

So, as shown above, the term, "100% Chicken" is fitting; since Chicken McNuggets are in fact composed of 100% Chicken--feathers and everything.